So, Gen V introduces IR battles and trading, via the card's integrated port. Here's the thing: By definition, you should be able to receive those signals using external hardware and output them to a transmitter. IR signals simply use infrared light; a receiver/transmitter like this one could intercept that signal. From there, the signal wouldn't need to be UNDERSTOOD; the PC would simply transmit it over the Internet to a connected machine, which would output it over its own IR transmitter. Like so: DS 1 --- PC 1 ====== PC 2 --- DS 2 So... With an application that would intercept the IR signal, transmit it to the other PC over the internet, get the second DS's response, and broadcast that: would it be possible to play online through IR? How strict is the timing- would network lag on a reasonable broadband connection be a problem? If not, this could allow for online Generation V play without going through the pains of Nintendo's friend code system, provided both ends had a single piece of hardware. The biggest issue is, again, the timing, which requires investigation. We'd also need to know what frequency the IR port outputs and expects to recieve.